I'm not an expert but they look exactly like my Salmon Faverolle chicks. Look at the link to see a Delaware chick. I don't see any of the brown on the wings like your chicks have but that might come with time as these are very young. Where your chicks all yellow when they were brand new?
a couple of my chicks look like your chick , but most of them have dark banding on their wings. I think I need ot call Ideal. *Sigh* I really wanted all Delawares.
Thanks for the pix!